android使用GPS定位及在googlemap添加标记
要使用googlemap,Activity要继承MapActivity. MapActivity是使用的google第三方API,所以要在配置文件中声明. 废话不多说，上代码:
manifest.xml中:
<?
xml version="1.0" encoding="utf-8"
?>
<
manifest
xmlns:android
="http://schemas.android.com/apk/res/android"
package
="com.t2cn.map"
android:versionCode
="1"
android:versionName
="1.0"
>
<
application
android:icon
="@drawable/icon"
android:label
="@string/app_name"
>
<
activity
android:name
=".MapViewActivity"
android:label
="@string/app_name"
>
<
intent-filter
>
<
action
android:name
="android.intent.action.MAIN"
/>
<
category
android:name
="android.intent.category.LAUNCHER"
/>
</
intent-filter
>
</
activity
>
<
uses-library
android:name
="com.google.android.maps"
/>
</
application
>
<
uses-permission
android:name
="android.permission.INTERNET"
/>
<
uses-permission
android:name
="android.permission.ACCESS_FINE_LOCATION"
/>
<
uses-permission
android:name
="android.permission.ACCESS_COARSE_LOCATION"
/>
</
manifest
>
注意一定要加<uses-library android:name="com.google.android.maps" />，并且加在<application></application>中，否则运行时会有classNotFoundException.
Activity:
public
class
MapViewActivity
extends
com.google.android.maps.MapActivity{
private
LocationListener locationListener;
TextView tv1;
GeoPoint gp;
MapView mapView;
private
Criteria criteria;
View popView;
private
Handler mHandler;
private
Location location;
private
MapController mapController;
private
LocationManager locationManager;
int
i;
@Override
public
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
this
.setContentView(R.layout.tv);
tv1
=
(TextView)
this
.findViewById(R.id.tv1);
openGPSSettings();
//
判断是否开启GPS
mHandler
=
new
MyHandler();
mHandler.post(runnable);
getLocation();
setMapView();
}
/**
* 判断是否开启GPS
*/
private
void
openGPSSettings() {
LocationManager alm
=
(LocationManager)
this
.getSystemService(Context.LOCATION_SERVICE);
if
(alm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {
Toast.makeText(
this
,
"
GPS模块正常
"
, Toast.LENGTH_SHORT).show();
return
;
}
Toast.makeText(
this
,
"
请开启GPS！
"
, Toast.LENGTH_SHORT).show();
Intent intent
=
new
Intent(Settings.ACTION_SECURITY_SETTINGS);
startActivityForResult(intent,
0
);
//
此为设置完成后返回到获取界面
}
/**
* 设置地图显示
*/
private
void
setMapView(){
this
.mapView
=
(MapView)
this
.findViewById(R.id.map);
this
.mapView.setBuiltInZoomControls(
true
);
//
可以多点触摸放大
mapView.setStreetView(
true
);
mapView.setBuiltInZoomControls(
true
);
this
.mapController
=
mapView.getController();
mapController.setZoom(
14
);
Drawable drawable
=
this
.getResources().getDrawable(R.drawable.marker);
//
设置图片的绘制区域大小
drawable.setBounds(
0
,
0
, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
this
.mapController.animateTo(gp);
//
通过动画方式移动到指定坐标
setView();
//
设置弹出框
MyOverlay myOverlay
=
new
MyOverlay(drawable,
this
);
myOverlay.addOverlay(
new
OverlayItem(gp,
"
hello
"
,
"
i'm in Athens,Greece!
"
));
mapView.getOverlays().add(myOverlay);
}
/**
* 设置地图标记弹出框样式
*/
private
void
setView(){
//
popView不为null,即界面刷新重新调用setMapView的时候不用重新创建popView,否则原来popView的监听事件不启作用
if
(popView
==
null
){
popView
=
super
.getLayoutInflater().inflate(R.layout.pop,
null
);
mapView.addView(popView,
new
MapView.LayoutParams(MapView.LayoutParams.WRAP_CONTENT, MapView.LayoutParams.WRAP_CONTENT,
null
, MapView.LayoutParams.BOTTOM_CENTER));
popView.setVisibility(View.GONE);
}
}
@Override
protected
boolean
isRouteDisplayed() {
//
TODO Auto-generated method stub
return
false
;
}
/**
* 获取位置信息
*/
private
void
getLocation(){
//
获取位置管理服务
String serviceName
=
Context.LOCATION_SERVICE;
locationManager
=
(LocationManager)
this
.getSystemService(serviceName);
//
查找到服务信息
criteria
=
new
Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
//
高精度
criteria.setAltitudeRequired(
false
);
//
不要求海拔信息
criteria.setBearingRequired(
false
);
//
不要求方位信息
criteria.setCostAllowed(
true
);
//
是否允许付费
criteria.setPowerRequirement(Criteria.POWER_LOW);
//
低功耗
String provider
=
locationManager.getBestProvider(criteria,
true
);
//
获取GPS信息
location
=
locationManager.getLastKnownLocation(provider);
//
通过GPS获取位置
updateToNewLocation(location);
//
设置监听器，自动更新的最小时间为间隔N秒(1秒为1*1000，这样写主要为了方便)或最小位移变化超过N米
locationListener
=
new
LocationListener(){
@Override
public
void
onLocationChanged(Location location) {
updateToNewLocation(location);
}
@Override
public
void
onProviderDisabled(String provider) {
//
TODO Auto-generated method stub
}
@Override
public
void
onProviderEnabled(String provider) {
//
TODO Auto-generated method stub
}
@Override
public
void
onStatusChanged(String provider,
int
status,
Bundle extras) {
//
TODO Auto-generated method stub
}
};
locationManager.requestLocationUpdates(provider,
100
*
1000
,
500
,locationListener);
}
/**
* 获取GeoPoint
*/
private
void
updateToNewLocation(Location location) {
if
(
true
){
double
latitude
=
31.16520805
*
1E6;
double
longitude
=
121.4000644
*
1E6;
//
if (location != null) {
//
double latitude = location.getLatitude()*1E6;
//
double longitude = location.getLongitude()*1E6;
gp
=
new
GeoPoint((
int
) latitude, (
int
) longitude);
tv1.setText(
"
维度：
"
+
latitude
+
"
\n经度
"
+
longitude);
}
else
{
tv1.setText(
"
无法获取地理信息
"
);
}
}
/**
* 发送位置信息到服务器
*/
Runnable runnable
=
new
Runnable(){
@Override
public
void
run() {
String provider
=
locationManager.getBestProvider(criteria,
true
);
location
=
locationManager.getLastKnownLocation(provider);
//
double lat = location.getLatitude()*1E6;
//
double lon = location.getLongitude()*1E6;
double
lat
=
31.16520805
*
1E6;
double
lon
=
121.4000644
*
1E6;
mHandler.postDelayed(runnable,
10
*
1000
);
Message message
=
mHandler.obtainMessage();
message.arg1
=
(
int
)lat;
message.arg2
=
(
int
)lon;
mHandler.sendMessage(message);
}
};
/**
定义MyHandler
*/
/**
* 自定义Handler
*/
class
MyHandler
extends
Handler{
public
void
handleMessage(Message msg) {
i
++
;
super
.handleMessage(msg);
int
lat
=
msg.arg1;
int
lon
=
msg.arg2;
gp
=
new
GeoPoint((
int
) lat, (
int
) lon);
mapController.setCenter(gp);
setMapView();
mapView.invalidate();
tv1.setText(i
+
"
:
"
+
"
维度：
"
+
lat
+
"
\n经度
"
+
lon);
//
tv1.invalidate();
};
}
}
地图覆盖物MyOverlay类:
public
class
MyOverlay
extends
ItemizedOverlay{
private
ArrayList
<
OverlayItem
>
mapOverlays
=
new
ArrayList
<
OverlayItem
>
();
private
MapViewActivity context;
private
TextView textView1,textView2;
public
MyOverlay(Drawable arg0) {
super
(arg0);
//
TODO Auto-generated constructor stub
}
public
MyOverlay(Drawable defaultMarker, Context context) {
this
(defaultMarker);
this
.context
=
(MapViewActivity)context;
}
@Override
protected
OverlayItem createItem(
int
arg0) {
//
TODO Auto-generated method stub
return
mapOverlays.get(arg0);
}
@Override
public
int
size() {
//
TODO Auto-generated method stub
return
mapOverlays.size();
}
protected
boolean
onTap(
int
index) {
MapView.LayoutParams geoLP
=
(MapView.LayoutParams)context.popView.getLayoutParams();
geoLP.point
=
mapOverlays.get(index).getPoint();
context.mapView.updateViewLayout(context.popView, geoLP);
context.popView.setVisibility(View.VISIBLE);
textView1
=
(TextView) context.popView.findViewById(R.id.map_bubbleTitle);
textView2
=
(TextView) context.popView.findViewById(R.id.map_bubbleText);
textView1.setText(mapOverlays.get(index).getTitle());
textView2.setText(mapOverlays.get(index).getSnippet());
context.popView.setVisibility(View.VISIBLE);
ImageView imageView
=
(ImageView) context.popView.findViewById(R.id.map_bubbleImage);
imageView.setOnClickListener(
new
View.OnClickListener(){
@Override
public
void
onClick(View v) {
context.popView.setVisibility(View.GONE);
}
});
return
true
;
}
public
void
addOverlay(OverlayItem overlay) {
mapOverlays.add(overlay);
populate();
}
}
用到的图片:
layout文件:
tv.xml 用来显示地图
<?
xml version="1.0" encoding="utf-8"
?>
<
LinearLayout
xmlns:android
="http://schemas.android.com/apk/res/android"
android:orientation
="vertical"
android:layout_width
="fill_parent"
android:layout_height
="fill_parent"
>
<
TextView
android:id
="@+id/tv1"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
/>
<
com.google.android.maps.MapView
android:id
="@+id/map"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:enabled
="true"
android:clickable
="true"
android:apiKey
="04lsJg9XJO11W63yc6Q3vsfb0HTJgiYxtTlCiGg"
/>
</
LinearLayout
>
pop.xml 用来显示地图覆盖物的弹出框
<
RelativeLayout
xmlns:android
="http://schemas.android.com/apk/res/android"
android:background
="@drawable/bubble_background"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:paddingLeft
="5px"
android:paddingTop
="5px"
android:paddingRight
="5px"
android:paddingBottom
="20px"
>
<
TextView
android:id
="@+id/map_bubbleTitle"
android:ellipsize
="marquee"
android:layout_width
="120px"
android:layout_height
="wrap_content"
android:gravity
="center_horizontal"
android:singleLine
="true"
/>
<
ImageView
android:id
="@+id/map_bubbleImage"
android:background
="@drawable/close"
android:layout_width
="30px"
android:layout_toRightOf
="@id/map_bubbleTitle"
android:layout_height
="wrap_content"
/>
<
TextView
android:id
="@+id/map_bubbleText"
android:layout_width
="150px"
android:layout_below
="@id/map_bubbleTitle"
android:layout_height
="wrap_content"
android:singleLine
="false"
/>
</
RelativeLayout
>
OK。 搞定